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MCQ

E-R model uses this symbol to represent weak entity set ?

Dotted rectangle.

Diamond

Doubly outlined rectangle

None of these

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If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has

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A domain is atomic if elements of the domain are considered to be ____________ units.

Different

Indivisbile

Constant

Divisible

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Data integrity constraints are used to:

Control who is allowed access to the data

Ensure that duplicate records are not entered into the table

Improve the quality of data entered for a specific property

Prevent users from changing the values stored in the table

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Which of the following is a low level operator?

Insert

Update

Delete

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category More Database Management System Topics

Miscellaneous or General

Relational Algebra

Database Systems

Data Models

The Relational Database Model

Entity Relationship (ER) Modeling

Advanced Data Modeling

Normalization

Structured Query Language (SQL)

Advanced SQL

Database Design

Transaction and Concurrency

Data Warehouses

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